added some citations
added some citations

crazycrank/SeminarDGL,AndreasFMueller/SeminarDGL,Darnor/SeminarDGL,El-Mono/SeminarDGL,Darnor/SeminarDGL,AndreasFMueller/SeminarDGL,El-Mono/SeminarDGL,crazycrank/SeminarDGL